//
//  YRWelcomeViewController.swift
//  YR 微博
//
//  Created by cyr on 15/10/13.
//  Copyright © 2015年 cyr. All rights reserved.
//

import UIKit
import SDWebImage

class YRWelcomeViewController: UIViewController {
    
    /**
     图像底部约束
    */
    private var iconBottonCons: NSLayoutConstraint?

    override func viewDidLoad() {
        super.viewDidLoad()

        prepareUI()
        
        // 加载用户头像
        if let urlString = YRUserAccount.sharedAccount?.avatar_large {
            // 更新图像，会自动更新imageView的大小
            iconView.sd_setImageWithURL(NSURL(string: urlString)!)
            
        }
    }
    
    // 设置动画
    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        
        iconBottonCons?.constant = -UIScreen.mainScreen().bounds.height - iconBottonCons!.constant
        
        UIView.animateWithDuration(1.2, delay: 0.0, usingSpringWithDamping: 0.8, initialSpringVelocity: 5.0, options: UIViewAnimationOptions(rawValue: 0), animations: { () -> Void in
            
            self.view.layoutIfNeeded()
        
            }) { (_) -> Void in
                
                // 发送通知,切换控制器
               NSNotificationCenter.defaultCenter().postNotificationName(YRRootViewControllerSwitchNotification, object: true)
        }
    }
    
 /// 准备界面
    private func prepareUI() {
        view.addSubview(backImageView)
        view.addSubview(iconView)
        view.addSubview(label)
        
        // 给控件自动布局
        // 1.背景图片
        backImageView.ff_Fill(view)
        
        // 2.头像
        let cons = iconView.ff_AlignInner(type: ff_AlignType.BottomCenter, referView: view, size: CGSize(width: 90, height: 90), offset: CGPoint(x: 0, y: -160))
        iconBottonCons = iconView.ff_Constraint(cons, attribute: NSLayoutAttribute.Bottom)
        
        // 3.标签
        label.ff_AlignInner(type: ff_AlignType.BottomCenter, referView: iconView, size: nil, offset: CGPoint(x: 0, y: 16))
    }


    // MARK: -懒加载控件
    // 背景图片
    private lazy var backImageView: UIImageView = UIImageView(image: UIImage(named: "ad_background"))
    
    // 用户头像
    private lazy var iconView: UIImageView = {
        let iv = UIImageView(image: UIImage(named: "avatar_default_big"))
        
        // 裁剪头像
        iv.layer.masksToBounds = true
        iv.layer.cornerRadius = 45
        
        return iv
    }()
    
    // 消息文字
    private lazy var label: UILabel = {
       let label = UILabel()
        label.text = "欢迎归来"
        label.sizeToFit()
        
        return label
    }()


}
